now-cli/lib/re-alias.js

// Native
const {join} = require('path')

// Packages
const fs = require('fs-promise')
const chalk = require('chalk')

// Ours
const {error} = require('./error')
const readMetaData = require('./read-metadata')
const NowAlias = require('./alias')

exports.assignAlias = async (autoAlias, token, deployment, apiUrl, debug) => {
  const aliases = new NowAlias(apiUrl, token, {debug})
  console.log(`> Assigning alias ${chalk.bold.underline(autoAlias)} to deployment...`)

  // Assign alias
  await aliases.set(String(deployment), String(autoAlias))
}

exports.reAlias = async (token, host, help, exit, apiUrl, debug, alias) => {
  const path = process.cwd()

  const configFiles = {
    pkg: join(path, 'package.json'),
    nowJSON: join(path, 'now.json')
  }

  if (!fs.existsSync(configFiles.pkg) && !fs.existsSync(configFiles.nowJSON)) {
    error(`Couldn't find a now.json or package.json file with an alias list in it`)
    return
  }

  const {nowConfig, name} = await readMetaData(path, {
    deploymentType: 'npm', // hard coding settings…
    quiet: true // `quiet`
  })

  if (!host) {
    const lastAlias = await alias.last(name)
    host = lastAlias.url
  }

  if (!nowConfig) {
    help()
    return exit(0)
  }

  let pointers = []

  if (nowConfig.alias) {
    const value = nowConfig.alias

    if (typeof value === 'string') {
      pointers.push(value)
    } else if (Array.isArray(value)) {
      pointers = pointers.concat(nowConfig.alias)
    } else {
      error(`Property ${chalk.grey('aliases')} is not a valid array or string`)
      return exit(1)
    }
  }

  if (nowConfig.aliases && Array.isArray(nowConfig.aliases)) {
    console.log(`${chalk.red('Deprecated!')} The property ${chalk.grey('aliases')} will be ` +
    `removed from the config file soon.`)
    console.log('Read more about the new way here: http://bit.ly/2l2v5Fg\n')

    pointers = pointers.concat(nowConfig.aliases)
  }

  if (pointers.length === 0) {
    help()
    return exit(0)
  }

  for (const pointer of pointers) {
    await exports.assignAlias(pointer, token, host, apiUrl, debug)
  }
}